Merge 2ff496b8a14f3f2c68cd5a4d71d3f50a892b4811: 'Build SDK repository.' Do not merge.

When the build is invoked with the fake target "sdk_repo" and
a main target of sdk, win_sdk or sdk_addon, we now create
packages in DIST_DIR that can directly be used to populate the
SDK Repository.
This is quite close to how we actually distribute the SDK.

Change-Id: I1c4a120616697383792d7fb1b328cfcefac0b2f5
2 files changed